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36 lines
926 B
36 lines
926 B
// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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// This program hung when run under the C/C++ ThreadSanitizer. TSAN installs a
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// libc interceptor that writes signal handlers to a global variable within the
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// TSAN runtime instead of making a sigaction system call. A bug in
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// syscall.runtime_AfterForkInChild corrupted TSAN's signal forwarding table
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// during calls to (*os/exec.Cmd).Run, causing the parent process to fail to
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// invoke signal handlers.
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import (
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"fmt"
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"os"
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"os/exec"
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"os/signal"
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"syscall"
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)
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import "C"
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func main() {
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ch := make(chan os.Signal)
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signal.Notify(ch, syscall.SIGUSR1)
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if err := exec.Command("true").Run(); err != nil {
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fmt.Fprintf(os.Stderr, "Unexpected error from `true`: %v", err)
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os.Exit(1)
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}
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syscall.Kill(syscall.Getpid(), syscall.SIGUSR1)
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<-ch
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}
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